Merge tag 'pull-target-arm-20231113' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * hw/arm/virt: fix GIC maintenance IRQ registration
 * target/arm: HVC at EL3 should go to EL3, not EL2
 * target/arm: Correct MTE tag checking for reverse-copy MOPS
 * target/arm/tcg: enable PMU feature for Cortex-A8 and A9

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# gpg: Signature made Mon 13 Nov 2023 12:45:33 EST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20231113' of https://git.linaro.org/people/pmaydell/qemu-arm:
  target/arm/tcg: enable PMU feature for Cortex-A8 and A9
  target/arm: Correct MTE tag checking for reverse-copy MOPS
  target/arm: HVC at EL3 should go to EL3, not EL2
  hw/arm/virt: fix GIC maintenance IRQ registration

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

3 files changed, 15 insertions, 3 deletions

diff --git a/target/arm/tcg/cpu32.c b/target/arm/tcg/cpu32.c
index 0d5d8e3..d9e0e2a 100644
--- a/target/arm/tcg/cpu32.c
+++ b/target/arm/tcg/cpu32.c
@@ -351,6 +351,7 @@ static void cortex_a8_initfn(Object *obj)
     set_feature(&cpu->env, ARM_FEATURE_THUMB2EE);
     set_feature(&cpu->env, ARM_FEATURE_DUMMY_C15_REGS);
     set_feature(&cpu->env, ARM_FEATURE_EL3);
+    set_feature(&cpu->env, ARM_FEATURE_PMU);
     cpu->midr = 0x410fc080;
     cpu->reset_fpsid = 0x410330c0;
     cpu->isar.mvfr0 = 0x11110222;
@@ -418,6 +419,7 @@ static void cortex_a9_initfn(Object *obj)
     set_feature(&cpu->env, ARM_FEATURE_NEON);
     set_feature(&cpu->env, ARM_FEATURE_THUMB2EE);
     set_feature(&cpu->env, ARM_FEATURE_EL3);
+    set_feature(&cpu->env, ARM_FEATURE_PMU);
     /*
      * Note that A9 supports the MP extensions even for
      * A9UP and single-core A9MP (which are both different
diff --git a/target/arm/tcg/mte_helper.c b/target/arm/tcg/mte_helper.c
index 70ac876..ffb8ea1 100644
--- a/target/arm/tcg/mte_helper.c
+++ b/target/arm/tcg/mte_helper.c
@@ -1101,10 +1101,18 @@ uint64_t mte_mops_probe_rev(CPUARMState *env, uint64_t ptr, uint64_t size,
     uint32_t n;
 
     mmu_idx = FIELD_EX32(desc, MTEDESC, MIDX);
-    /* True probe; this will never fault */
+    /*
+     * True probe; this will never fault. Note that our caller passes
+     * us a pointer to the end of the region, but allocation_tag_mem_probe()
+     * wants a pointer to the start. Because we know we don't span a page
+     * boundary and that allocation_tag_mem_probe() doesn't otherwise care
+     * about the size, pass in a size of 1 byte. This is simpler than
+     * adjusting the ptr to point to the start of the region and then having
+     * to adjust the returned 'mem' to get the end of the tag memory.
+     */
     mem = allocation_tag_mem_probe(env, mmu_idx, ptr,
                                    w ? MMU_DATA_STORE : MMU_DATA_LOAD,
-                                   size, MMU_DATA_LOAD, true, 0);
+                                   1, MMU_DATA_LOAD, true, 0);
     if (!mem) {
         return size;
     }
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 41484d8..a2e49c3 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2351,6 +2351,8 @@ static bool trans_SVC(DisasContext *s, arg_i *a)
 
 static bool trans_HVC(DisasContext *s, arg_i *a)
 {
+    int target_el = s->current_el == 3 ? 3 : 2;
+
     if (s->current_el == 0) {
         unallocated_encoding(s);
         return true;
@@ -2363,7 +2365,7 @@ static bool trans_HVC(DisasContext *s, arg_i *a)
     gen_helper_pre_hvc(tcg_env);
     /* Architecture requires ss advance before we do the actual work */
     gen_ss_advance(s);
-    gen_exception_insn_el(s, 4, EXCP_HVC, syn_aa64_hvc(a->imm), 2);
+    gen_exception_insn_el(s, 4, EXCP_HVC, syn_aa64_hvc(a->imm), target_el);
     return true;
 }